How do I handle errors in Node.js when querying a database?

How do I handle errors in Node.js when querying a database?

In Node.js, you can handle errors during database queries using try-catch blocks or by checking the error in the callback function.

Can you give me an example of using a try-catch block?

Sure! Here's a simple example:

async function fetchData() {
    try {
        const result = await db.query('SELECT * FROM users');
        console.log(result);
    } catch (error) {
        console.error('Error querying the database:', error);
    }
}

What about using promises? How do I handle errors there?

When using promises, you can use the .catch() method to handle errors. For example:

db.query('SELECT * FROM users')
    .then(result => console.log(result))
    .catch(error => console.error('Error querying the database:', error));

Are there any best practices for error handling in database queries?

Yes, some best practices include logging errors, providing user-friendly messages, and ensuring that your application can recover gracefully from errors.